Filing receptacle



'Nov. 27, 1945. o. CLEVEN ET AL FILING RECEPTACLE 3 Sheets-Sheet 1 INVENTORS Filed May 27, 1944 OLUF L. 61. EVEN LAWKE/VCE A. W14 so/v,

Patented Nov. 27, 1945 2,389, 12 FILING RECEPTACLE Oluf L. Cleven, Washington, 1),. ,C., and Lawrence A. Wilson, Riva, Md-

A-pplication May 27, 1944, Serial 537,666

(Gran-ted under the act of March 3, 1883, as amended April 30, 1928; 370 0. .G. 7357 7 Claims- The invention described herein may be manufactured and used by or for the Government of the United :States for governmental purposes and without the payment to us of any royalty thereon in accordance with the provisions of the act of April .30, 1-928 -(-,Gh. 460, 45 Stat. L. .467)

This invention relates to filing receptacles and more particularly to improvements in -f ollowers for vertical card tiles.

The follower of the present inventionis intended to be shift-ably moun d in :a filing cep cl for adjustment into a position in which its compressor plate engages the files therein. In a prevferred embodiment, the atollower is ada ted in .adiusted position to ice locked to the filing reoeptaole andpwhen locked, to be so operated as to advance its compressor -p1a1te toward the engaged files, whereby the files will .be -.compressed and remain in such condition until they are to he :re .movediroin the receptacle.

The construction and functions of thei'ollower of the zpltesent invention make it well suited to the requirements of files for the cards used in business and other automatic machines- .In such machines itiis important that the cards be straight and hat, otherWisethe maehinamey not perate in thedesiredmanner.

Experience shows that :business machine cards often become :bent {or warped for various :reasons and then, if iedrintoa machine, interfere with its normal operation. :For example, the cards may become :bent or Warped from handling. The cards willalso tendjto buckle when expo e t the atmosphere. Loosely arranged eards :in ;a :lilin .necepta-cle :permit air and its moisture to enter the spaces betweenzadjoining cards. -'l3his air and moisture is taken up {by :the cards and causes them to :lose theirstraight and :flatcondition.

Filing receptacles provided with .cards resting on "their edges and with .a follower embodying the present -invention will straighten warped or bent cards and will prevent the warping or buckling of flat, straig ht cards. Thisend'is accomplis'hed by the compressor plate of the 01- lower which exerts 'pressureagainstthe cards and maintains them in close y *packed condition, the action "of the compressor plate being that of -a 'press.

It 'is therefore an object of this invention *to provide a file follower with an improved locking device for securely locking the 'follower in any position pfadi'ustmentin a ,filing receptacle.

,Anotherobject is to ,provide a follower lockin .device which provides IOrlocking of thejollower .55

in adjus d p si io y s r ng a tion under t e ntr of a finger lev r and o r l ase of th follower by cam action under the control of the .fine ever.

S i l inother object is to provide an improved vfollower ,for compressing fil d ma iel and a l taming such material in los ly pa k d, ommessedieenditioh- A further object is to provide a relatively simple and inexpensive file receptacle follower having a carriage which is adjustable in a file receptacle, ich s pports a comp e s r n which carries ,means for locking the ,carriage in adjusted position .and then advancing the compressor by the action .of a finge controlled cam which .015- erates against the action of a spring or the like tending to withdraw the compressor .to a retracted position.

Astill further object is to provide a compressor type of file follower which is characterized by its simplicity in construction, ,by the ease with which it may be operated, locked and controlled to compress filed material, and which is durable to insure along, useful life.

Another ,object is to provide an improved ,card ,iollower for use with a filing receptacle ,for ,machine cards, tabulating cards and the like, which deteriorate or warp if not closely packed when filed, thefollower being adapted to'c m-press t filed material at a desired pressure and to maintain the compr ssed condition of the material as lon iasdesired- Qther objects ,and advantages willibe apparent vvfrom the iollowiryg description, the appended claimaand the accompan ing drawings,' wherein .Fig. 1 is a perspective view of a card file follower em odying the present vention and installed ;in a 03 36. file receptacle holding material suchascards, photographsor the like.

F,i, g.,2 .isa transverse, vertical ,sectional view through the receptacle of Fig. ,1 andishow s a .rear elevational view of the follower.

Fig. 3 is .,a top plan view of the v l-lllower of tags. ,1 and 2, the side walls of the filin receptacl eing shown in i cross-section at the ,level of thesideiwalltracks orvohannel guides.

I Figs. 1, .2 and 3, the fin er lever is in such position that the follower carriage is ;free to slide on the .lieeept ele side ,wall .tracks and the com- ,n ess r plate isinretracted position.

fi 4 is an expl d d .v ewof the am m m er andfinger,levenassemblyof Figs. 1 zand 3.

.Fig. ,5 ,is a cross-sectional view taken on ,line 5-4 ,of Eig. 2, .but with the finger le er in stich position that the ,.f0l1ower carriage ,is secu ely Figs. 1,2 and 3.

- and Fig. 8 showing the same roller in such adjusted position that its associated carriage shoe is free to slide in its track.

Fig. 9 is a top plan view corresponding to Fig. 3, 1

but with the finger lever in such position that the compressor plate is in retracted position and'the follower carriage is locked to the receptacle side wall tracks.

Referring now to the drawings in providing a description of this invention, the follower may be used with any conventional filing receptacle ID for holding materials H, such as tabulating cards, sheets, photographs, files and the like, which are arranged in vertical position with their edges resting on the receptacle bottom |2. The receptacle I may be in the form of a file drawer or tray having the usual front, side and rear (not shown) walls. The inner receptacle sidewalls are provided with guides, which may be channels i3 set in side wall recesses, as illustrated in Figs. l, 2, 3, 5, 6, 7 and 8. The channels |3 serve as tracks for the follower and extend in parallel relation for the full length of the receptacle Hi. The follower rides on the tracks l3 and is adaptedfor rectilinear shifting movement toward and away from the receptacle front wall M to permit inspection of filed material and to adjust the spacing of the receptacle front wall l4 and the follower according to the amount of filed material The follower comprises a compressor plate 20 and a locking bar 2| which are mounted on and positioned at opposite (front and rear) sides of a carriage 22, as illustrated for example, in The carriage 22 also supports a finger lever 23 which is operable to control the bar 2| in its carriage locking and releasing action and to control advancing and retracting movements of the compressor plate 20 relative to the carriage 22.

The compressor plate 2|] is preferably flexible in the plane of the paper, referring to Fig. 6, and is preferably formed of sheet metal or other material having the resilient characteristic indicated by this disclosure. The plate 20 (see Fig. 2) has a length slightly less than the inside Width of the receptacle HI and a height slightly less than the height of the cards or material H to be filed in the receptacle H). The flexibility of the compressor plate 25 is limited substantially to the plane of the paper, looking at Fig. 6, by providing longitudinally extending reinforcement at its upper and lower edges and at its median line or center. The reinforcement for the upper and lower edges 25 and 26, respectively, may be secured by rearwardly bending the upper and lower marginal portions of the plate 26 as illustrated more clearly inFig. 6. The central reinforcement for the plate 20 is secured by a rib or fold 21 extending from end to end thereof, as illustrated in Figs. 3, and 6. The plate 20, except for its reinforcement, is of uniform arcuate shape in vertical cross-section substantially from end to end and as illustrated in solid lines in Fig. 6. The compressor plate 20 thus presents to the cards ll rounded edges and a substantially concave front face. Consequently, when the follower is pressed against the cards II, they will be gripped initially along lines adjacent and par allel to their upper and lower edges and the upper and lower halves of the compressor plate will then yield in the manner of leaf springs until they come to a state of rest and exert the desired pressure on the cards 7 The follower carriage 22- comprises two shoes 30 rigidly connected by a plate or cross-member 3| extending from side to side of the receptacle If).

The shoes 30, as-illustrated in Figs. 2, 3, 5 and 6 rest in the channels or tracks |3 and are proportioned to be freely slidable longitudinally in the tracks l3, although having a sufficiently close fit therein to prevent substantial movement of they shoes 30, and consequently the carria e 22, in any direction excepting longitudinally of the tracks l3. The outer side of the rearward end of each shoe 36 is recessed for a width corresponding substantially to the width of its track 'pressor plate fold 21 by a pin 4|.

l3 (see Fig. 5) and for the purpose of providing 8). The inner side of the rearward end of each shoe is provided with a rectangular recess 33 (see Figs. 5, 7 and 8) extending through the lower shoe edge.

The locking bar 2| is a rigid member extending from side to side of the receptacle I0 and provided at each end With a roller 35 which rides in the corresponding channel or track l3. In a preferred embodiment of this invention, the locking bar 2| is supported by the tracks |3 throu h the rollers 35. As illustrated in Figs. 5, 7 and 8, the ends of the bar 2| are disposed in the shoe recesses 33 and the rollers 35 underlie the Wedges 32. The shoe recesses 33 are of such proportions that they permit limited movement of the look ing bar 2| in a direction parallel to the shoes 35 and permit the shoes 30 to rise in the channels l3 and relative to the locking bar 2|. When the ends of the bar 2| are positioned rearwardly in the shoe recesses 33 (see Fig. 8), the shoes 30 are free to slide, and the rollers 35 are free to roll, in the tracks I3. If the bar 2| is advanced relatively to the shoes 30fand to the position illustrated in Fig. '7, the rollers 35 and the wedges 32 coact to lock the shoes 30 to the tracks l3 and therefore the carriage 22 to the receptacle l0.

Support for the compressor plate 20 is provided by a tubular-member or tube 40 which extends through the carriage plate 3| (see Figs. 5 and 6). The forward end of the tubular member 4|] is bifurcated so as to embrace the compressor plate fold '21, as shown in Figs. 3 and 6. The tubular member 40 is rigidly secured to the com- Collapse of the fold2'l is avoided by a small insert 42, which may be seen in Figs. 5 and 6, and through which the pin 4| extends. The rearward end of the tubular member 40is also bifurcated to provide diametrically opposite slots 43 for slidably receiving the locking bar 2| (Figs. 2, 3, 5 and 6). The sliding connection of the bar 2| and the tubular-member 40 is provided for several reasons. The bar 2| may move between the positions illustrated by Figs. 7 and 8 and independently of the tubular member 40. The compressor plate 20 and the tubular member 40 may be advanced and retracted as a unit and relative to the bar 2|, but are precluded from having any rotary movement.

The carriage 22 (see Fig. 5) is also provided with a cam member 50, the finger lever or handle 23, and a spring 52 to form operating and'control. means for the locking bar 2| and the .com-

pressor plate 26. The cam member is operated by the lever :23 force the compressor plate and the locking bar 21 in opposite directions the told 21 in the retracted position of the compressor plate 20. One of these cut-outs 55 may be seen. in Fig. '4. Between these cut-outs 55 and et -opposite sides or the member 50, the latter is pmvid'ed with two cam edges 55 which, during rotary movement o'f :the cam member :50 :rrom the setting of Fig. 3, act similarly-and simultaneously on the compressor plate told"?! and at epp'osite sides of the tubular member to torce "the. "compressor plate 20 toward the front of the receptacle n and away from the carriage plate 4|. The advanced position of the compressor plate '2 0 is shown Figs. and 6. During the reverse rotary movement of the cam member '50,

the spring '52 is effective to withdraw the compressior plate '28 from its advanced position of Figs. 5 and 6 to its retradted position of Fig. 3.

rearward endedge of the roam member has two diametrically iopposite extended portions 51 which (serve as abutments for the locking bar :24 in the :cam position illustrated Figs. 2 and 3. These abutments 51 are aligned =(see Figs. 3 and 49 the cut-outs in the other end of the member At one side of each or these abutments 5! the end edge of the cam member 50 T tion of Fig. 2, the locking bar 2i] slides forwardly along the two cams 58 and from the setting of Figs. 1, 2, 3 and 8 to the setting of 5, 6, '7 and "9 under the action "of'the spring 52.

The form and manner of assembly of the cam member 50 and the finger lever 23 will be apparent :from 6., 4, 5 and =6. The icam member 5!] is of reduced outer diameter at its rearward end to facilitate its insertion into the aperture of corresponding and shape in the center of the carriage .plate 3 The cam member 50 has a shoulder fi l which rests against the marginal portion 'of the carriage plate 3 l surrounding its central aperture. The finger lever 23 has an enlarged, apertured inner end '6 2 which closely fits the protruding end of the cam member till at the rearward side of the carriage plate 31 and engages the latter as illustrated in Figs. 3, 5, *6 and 9. Prongs 63 4) formed on the rearward edge of the cam member 50 are bent into engagement with ,rn-otch'es *64 (Fig. 4:) in the finger lever 23 whereby the carriage plate 31., themember-50 and the lever \23 are so assembled that the cam member 58 is precluded rrom axial movement, but is free to be rotated about its axis by the .finger lever 23. Looking at Fig. :2, clockwise movement of the finger lever 23 is limited by a pin '(Figs. l and 3) on the carriage plate 31, and counterclockwise movement is limited by engagement :of the surfaces 56 (Figs. 3 and 9) on the camm'em- .ber 50 with the locking bar 21 as illustrated in Fig. 5. The action of the cams 58 may be aided by providing beveled sections it! (Figs. 3 and 5) on the engaged portions of the locking bar ll The spring 52 is conveniently housed in the tubular member 411 and is connected at its opposite ends to the :compressor plate .20 and the lock-' ling bar 2:! in the manner indicated by Figs. 5 and 6. The locking bar 21 may benotched at 68 (Fig. 5:) to accommodate the adjacent coils of. the spring 52 when both the compressor plate .20 and the locking bar 21 are fully retracted relative to the carriage plate 31 and in the positions indicated :by 9.

. Operation The most desirable results from the use of the present invention are secured when the receptacle 10 is to receive cards or other flat filing material having alength corresponding closely to the inside width of the receptacle in and having such width that when resting with an edge on the receptacle bottom its upper edge is slightly higher in elevation than the upper edge '25 of the compressor plate -2t.

Space is provided in the front of the receptacle for the tiling of cards 'I I by shiiting'the "follower rearwardly,.this movement being readily accomplished when the finger lever 23 is in the position of Figs. 1, 2 and 3. When the cards 11 are prop- 'erly arranged 'on edge in the receptacle In, the follower is shifted forwardly and to the position of Figs. 1 and 3, in which its compressor plate '20 engages the adjacent card H along horizontal lines adjacent its upper and lower edges. "The cards I i are now somewhat closely packed between the front wall 14 off the receptacle and the compressor plate 20. At this time the cross-sectional shape of the compressor plate '20 is that illustrated in full lines in Fig. 6 and the follower parts are set as represented in Figs. '1, 3 and 8. The compressor p'Iate'ZO is in its fully retracted position relative to the carriage plate 3].. 'The locking bar 21 is spaced from the plate 31 by the two aibutments 5'! (Fig. 3) which equalize the action on the bar 21 at opposite sides of the tube '45 to retain each of the two rollers 35 in the setting illustrated by Fig. 8, whereby the carriage shoes 30 are free to slide in their tracks I3. It will be noted that the spring 52 is effective to yieldingly maintain the compressor plate 20 in its retracted position and the locking .bar '2'] in enagement with both of the abutments 51.

The operator with one hand may advance the fol-lower in the direction towards the cards ll until they contact and then, with the same hand, may rotate the finger lever '23 counterclockwise :from the full line position of Fig. 2. In its first few degrees of rotary movement, the finger lever 23 reaches the setting of Fig, 9. Duringthis initial lever movement, the two abutments 5'! pass to out-of-the-way positions relative to the locking bar 2| and the two earns 58 slide past the locking bar 2|, permitting it to be drawn forwardly by the action of the spring '52 from the setting of Figs. 3 and "8 to the setting of Figs. 7 and 9.. The extent of the abutments 57 and the cams 58 peripherally of the cam member 50 is limited to' secure resetting of the locking bar 2| with a limited movement of the finger lever 23, which movement need-notlbe more than about thirty or forty degrees. Since the cams 58 are identical and engage the bar 2| simultaneously, the spring 52 advances the two rollers -35 similarly and simultaneously to the carriage locking position of Fig. 7. The forward movement of the locking bar 2| is determined by the extent of movement required by the rollers in looking the carriage shoes ill to their tracks 13. .As the locking bar 2 moves forwardly, it carries with it the rollers 35 from the setting of Fig. 8 to the setting of Fig. 7. The rollers 35 in the Fig. '7 positionso co-act with the wedges 32 that the rollers 35 are forced against the lower-flanges of the tracks l3 and the carriage shoes 30 are forced against the upper flanges of the tracks l3. This co-action of the rollers 35, the shoes 30 and the tracks l3is effective to lock securely the follower carriage 22 to the receptacle side walls and to maintain the carriage 22 in the desired position of adjustment. It will also be noted that any force exerted on the carriage 22 in a direction to move it rearwardly (away from the receptacle wall M) can only result in an increase in the locking efiect of the rollers 35 and the wedges 32. The spring 52 is adequate to prevent accidental movement of the locking bar 2| and its rollers 35 to carriage releassition of Fig. 2 is the locking of the carriage 22 in its position of adjustment.

During the remainder of its rotary movement to the dotted line position of Fig. 2 and the full line position of Fig. 5, the finger lever 23 through the action of the two cam edges 56 on the fold or rib 21 advances the central section of the compressor plate 20 and increases gradually and progressively the pressure exerted by the upper and lower portions of the plate 20 on the cards The plate 20 yields under this cam action and may have face to face contact with the adjacent card The cross-sectional shape of the plate 20 may now be substantially that illustrated in dotted lines in Fig. 6. The advancing movement resulting from operation of the finger lever 23 is effective to highly compress the cards H and thereby squeeze out any air disposed between any two adjacent cards According to the illustrated and preferred embodiment of this invention, locking of the carriage 22 is quickly accomplished in about the first quarter of the arcuate movement of the finger lever 23 between its two positions of Fig. 2 and the advancing movement of the compressor plate rib or fold 21 is gradually accomplished during the last three quarters of such arcuate movement. Thus a powerful thrust is imparted to the compressor plate fold or rib 27 with only a finger pressure on the lever 23, and mechanical compression of the cards II is secured by a smoothly acting follower.

' The arcuate or rotary movement of the finger lever 23 is limited by engagement of the diametrically opposite cam member surfaces 66 with the upper and lower sides of the locking bar 2|. One of these surfaces 66 may be seen in Fig. as engaging the lower side of the bar 2|.

' When the finger lever 23 is in the dotted line position of Fig. 2 and the position of Figs. 5 and 6, the compressor plate rib or fold 21 rests against the two diametrically opposite abutments 10 at the outer ends of the cam edges 56. These abutments 10, like the abutments 57, are defined by edge surfaces lying in a plane normal to the aXis of rotation of the cam member 50. Accidental displacement of the compressor plate from its advanced position is therefore avoided.

It is now clear that with the bar 2| and the plate 20 in the positions of Figs 5 and 6, the follower carriage 22 is locked securely in adjusted position by a wedging action and the compressor plate 20 cooperates with the front receptacle wall M to highly compress the cards H in a squeezing or pressing action which excludes air and moisture from all but edge surfaces of the cards II. This action not only presses out wrinkles, bends and other distortions in the cards, but precludes Warping and buckling of the cards while not in use.

When the cards H are to be removed from the receptacle I0, the finger lever 23 is shifted from the dotted to the full line position of Fig. 2 and the follower is moved toward the rear of the receptacle to facilitate access to the cards Return of the lever 23 to the full line position of Fig. 2 results in the follower being operated in a, reverse manner to that heretofore described under the heading Operation. During the first three quarters of the arcuate movement of the lever 23 to the right (Fig. 2), the spring 52 draws the compressor plate 20 towards the carriage plate 3| until the follower parts have the setting of Figs. 7 and 9, Continued movement of the lever 23 for the last quarter of its travel shifts the cam 7 surfaces 58 into engagement with and then beyond the beveled edge portions 6! of the locking bar 2| to reset the rollers 35, as shown in Fig. 8, and thereby release the follower for sliding action along the tracks I3.

The lever 23 comes to rest (Fig. 3) when it engages the pin 65. The compressor plate 20 is now fully retracted, its rib or fold 2'! being received within the cam member cut-outs 55.- The looking bar 2| is held in the carriage releasing position by the two cam abutments 51.

The foregoing is to be understood as merely being by way of illustration, since this invention includes all modifications and embodiments thereof falling within the scope of the appended claims.

We claim:

1. In a card file, the combination with a card tray having inner side walls provided with tracks extending between the tray end walls, of a card follower comprising a carriage slidably received by said tracks for rectilinear movement relative to the front end wall of said tray, a card compressor plate, a carriage locking bar, said plate and said bar being supported by said carriage for independent rectilinear movement relative to each other and to said carriage and being respectively positioned forwardly and rearwardly of said carriage, manually operated rotatable cam means supported by said carriage for shifting separately said plate and said bar in opposite directions and away from said carriage, and resilient means urging said plate and said bar toward said carriage, said cam means being operable in one direction to release said locking'bar for movement by said resilient means to lock said carriage to said tracks and then to advance said compressor plate relative to the locked carriage and against the action of said resilient means.

2. In acard file, the combination with a card tray having inner side walls provided with tracks extending between the tray end walls, of a card follower comprising a carriage slidably received by said tracks for rectilinear movement relative to the front end wall of said tray, a card compressor plate, a carriage locking bar, said plate and said bar being supported by said carriage for independent rectilinear movement relative to each other and to said carriage and being respectively positioned forwardly and rearwardly of said carriage, manually operated rotatable cam means supported by said carriage for shifting separately said plate and said bar in opposite directions and away from said carriage, and resilient means urging said plate and said bar toward said carriage, said cam means being operable in one direction to release said compressor plate for movement by said resilient means and then to force said locking bar against the action of said resilient means from carriage locking position to carriage releasing position.

3. In a card file, the combination with a card tray having channels extending between the ends thereof, of a card follower comprising a carriage slidably supported by said channels, an apertured ca'm member supported by said carriage for rotary movement and having its forward and rearward edges formed with cams, an operating handle for said cam member, a tube extending through and axially of said cam member for axial sliding movement therein, a compressor plate secured to one end of said tube for movement by the cams at the forward edge of said cam member, said tube having a bifurcated rearward end to provide longitudinally extending slots, a locking bar extending through said slots for movement axially of said tube and for engagement with the cams at the rearward edge of said cam member, means carried at the ends of said locking bar and positioned in said channels, said means with said bar in retracted position locking said carriage to said channels and with said bar in extended position releasing said carriage for sliding movement, and resilient means urging said compressor plate and said locking bar toward each other for operative engagement with the adjacent cams of said cam member during rotary movement thereof, said cams being so set on 'said cam member that in one direction of rotary movement thereof the rearward cams release the locking bar for retracting movement by said resilient means and then the forward cams advance said compressor plate relative to said carriage and that in the other direction of rotary movement thereof the forward cams release the compressor plate for retracting movement by said resilient means and then the rearward cams engage said locking bar to shift said bar from retracted position to extended position for releasing said carriage.

4. In a card file, the combination with a card tray having inner side walls provided with channels extending between the tray and walls, of a card follower comprising a, member extending between said tray side walls and having rigidly connected thereto shoes slidably received by said channels, said member and shoes forming a carriage shiftable for rectilinear movement toward and away from the tray front end wall, a ring shaped cam member journaled in said carriage member for rotary movement, a finger lever carried by said cam member for manually operating said cam member, a tubular member extending through said cam member and said carriage memher and axially slidable in said cam member, said tubular member having a bifurcated rearward end, a locking bar slidably received within said bifurcated end for rectilinear movement under the control and action of said cam member and toward and away from said carriage member, means carried at the ends of said locking bar and positioned in said channels, said means with said bar in retracted position forcing said shoes into locking engagement with said channels and with said bar in extended position releasing said shoes for slidingmovement in said channels, and a compressor plate secured to the forward end of said tubular member for sliding movement therewith relative to said carriage member under the control and action of said cam member, and resilient means urging said compressor plate and said locking bar toward each other and toward said carriage member.

5. In a card file, the combination with a card tray having inner side walls provided with tracks extending between the tray end walls, of a card follower comprising a carriage slidably supported by said tracks, means associated and movable with said carriage for locking said carriage to said tracks, and a resilient compressor plate carried by said carriage and having rearwardly bent top and bottom edges, said plate having a generally arcuate shape from top to bottom to provide a substantially concave front wall surface, said plate also having a rearwardly projecting reinforcing fold adjacent its median line extending from end to end thereof. I

6. In a card file, the combination with a card tray having opposite side walls and an end wall, of a resilient, card compressor plate mounted in said tray for rectilinear, slidable adjustment movement toward and from said end wall, said platehavin a generally arcuate shape from top to bottom to provide a substantially concave wall surface facing said tray end wall, said plate also having longitudinally extending integral reinforcement adjacent its median line.

7. In card file, the combination with a card tray having opposite side walls and an end wall, of a resilient, card compressor plate mounted in said tray for rectilinear, slidable adjustment movement toward and from said end wall, said plate having such length that the side edges thereof are closely adjacent the inner surfaces of said tray side walls, said plate having rearwardly bent top and bottom edges and a generally arcuate shape from top to bottom to provide a substantially concave front wall surface substantially from tray side wall to tray side wall, said wall surface facing said tray end wall, said plate also having a rearwardly projecting reinforcing fold adjacent the plate median line and extending from end to end of said plate.

OLUF L. CLEVEN. LAWRENCE A. WILSON. 

